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United States Patent |
6,021,701
|
McKeegan, Jr.
,   et al.
|
February 8, 2000
|
System for cutting and finishing muntins
Abstract
A system is provided for cutting and finishing muntins. The system
comprises a device for cutting muntins, a device for pinning muntins, and
at least one device for punching muntins. The device for cutting muntins
comprises a pair of cutting blades that are independently rotatable,
translatable and positionable, and indexable, and further comprises means
for precisely measuring muntins fed into the apparatus. The device for
pinning muntins comprises means for stabilizing a muntin during punching;
a guide, which is preferably magnetic; a pin or a blade, which is
preferably made of metal; means for punching the pin or blade into a
muntin; and means for precisely measuring the location at which a pin or
blade is to be punched into a muntin. The at least one device for punching
muntins comprises means for stabilizing a muntin strip; means for cutting
the muntin strip; and means for translating the means for cutting. Power
for the at least one punching apparatus is preferably pneumatic. More than
one punching apparatus can be powered from the same pneumatic source.
Inventors:
|
McKeegan, Jr.; John (45866 Denise Dr., Plymouth, MI 48170);
Bracy; Rodney E. (11805 Davis Rd., Middleville, MI 49333)
|
Appl. No.:
|
813699 |
Filed:
|
March 7, 1997 |
Current U.S. Class: |
83/471.3; 29/795; 29/897.31; 83/473; 83/485 |
Intern'l Class: |
B23D 019/04; B23P 019/00 |
Field of Search: |
83/471.1,471.3,473,485,877,878
29/795,897.31
|
References Cited
U.S. Patent Documents
4640161 | Feb., 1987 | Kurk | 83/471.
|
4969380 | Nov., 1990 | Halligan | 83/878.
|
5176060 | Jan., 1993 | Thornton | 83/471.
|
5295292 | Mar., 1994 | Leopold | 29/417.
|
5574651 | Nov., 1996 | McKeegan et al. | 29/795.
|
Primary Examiner: Rachuba; M.
Assistant Examiner: Pryor; Sean
Attorney, Agent or Firm: Weintraub & Brady, P.C.
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a completion application of co-pending provisional U.S.
patent application Ser. No. 60/012,987, entitled "SYSTEM FOR CUTTING AND
FINISHING MUNTINS", filed Mar. 7, 1996, and is a continuation-in-part of
U.S. patent application Ser. No. 08/680,507, filed Jul. 8, 1996 for
Apparatus for Cutting and Assembling Muntins now U.S. Pat. No. 5,860,346
which is in turn a continuation of U.S. patent application Ser. No.
08/293,799, filed Aug. 22, 1994, for Apparatus for Cutting and Assembling
Muntins now abandoned, the disclosures of which are hereby incorporated by
reference.
Claims
Having thus described the present invention, what is claimed is:
1. A device for pinning muntin strips, the device comprising:
(1) means for stabilizing a muntin strip;
(2) means for piercing a muntin strip;
(3) means for punching the means for piercing through a muntin strip
(4) means for retracting the means for punching from the muntin strip, the
means for piercing being retained within the muntin strip; and
(5) means for setting a location on a muntin strip where the means for
piercing is to be inserted.
2. The device for pinning muntin strips of claim 1 wherein the means for
piercing is a pin, and the means for punching inserting the pin within a
muntin strip after the means for punching the pin has retracted therefrom.
3. The device for pinning muntin strips of claim 2 wherein the means for
stabilizing a muntin strip is a plurality of channels, each of the
plurality of channels being substantially the same size and shape as the
cross-section of a differently-sized muntin strip.
4. The device for pinning muntin strips of claim 2 further comprising a
guide configured to receive and removably hold a pin, and wherein the
guide is a magnetic solid member.
5. The device for pinning muntin strips of claim 1 wherein the means for
stabilizing a muntin strip comprises means for clamping.
6. The device for pinning muntin strips of claim 1 wherein the means for
piercing is a pin.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the cutting and pinning of muntins. More
particularly, the present invention pertains to devices for cutting and
pinning muntins. Even more particularly, the present invention concerns a
system for cutting and pinning muntins.
2. Description of the Prior Art
Traditionally, muntins, or muntin strips, have been used as decorative
dividers or spacers between or outside panes of glass used for windows and
doors. The muntins render the panes of glass aesthetically appealing.
Because the muntins are frequently utilized between glass panes, they must
present a flat mating surface to prevent the glass from mis-seating
against them. A flat surface is reasonably easy to sustain if the muntins
are all aligned in a single direction. However, it becomes more difficult
to sustain a flat mating surface at an intersecting joint of two muntins
laid out in different directions or in other directional configurations.
Another common problem is separation of the muntins, which may occur at
intersecting joints over a period of time. This destroys both the designs
created with the muntins and the aesthetic quality provided to the window
by the placement of the muntins.
Several methods for assembling muntins to provide flat and strong
intersecting surfaces are known. For example, muntin sections have been
welded together to create a solid grid-type lattice structure, and then
ground at the weld to eliminate rough surfaces created by the weld.
However, the welded strips, although structurally solid, create other
problems. Glass panes, whether in a window or a door, expand in warm
temperatures and contract in cold temperatures. To accommodate for this
expansion and contraction, the muntins must be flexible. Welded muntins
tend to be inflexible, which causes the glass panes to eventually crack.
Also, the grinding of the weld does not produce consistently flat surfaces
at the weld. This promotes stress on the glass panes. Further, heat from
welding occasionally causes the muntins to warp, which also causes stress
on the glass panes.
Thus, other methods and devices have been developed to provide muntin grid
assemblies that are reasonably solid and flexible. A typical example of
this is the keeper developed by Allmetal, Inc. of Itasca, Ill. The
Allmetal keeper is a plastic keeper or connector that is used to join
muntin sections, wherein each plastic keeper is installed in a first
muntin section. Additional muntin sections are then mounted onto each
keeper to form a grid.
An alternate keeper is that developed by Hygrade Metal Moulding
Manufacturing Corp. of Farmingdale, N.Y. The keeper sold by Hygrade has a
different configuration than that of Allmetal, but is used in a similar
fashion to that of Allmetal in that each keeper is installed in a first
muntin section and additional muntin sections are then mounted onto each
keeper to form a grid.
Although the keeper systems of Allmetal and Hygrade provide structured
flexibility, both solidity and flexibility in lattice design are limited
because of the shape of the joining ends of the muntin sections in these
systems. The ends of muntin sections are commonly square cut, as needed,
to mate flush against another muntin. However, problems arise when muntin
sections are not shaped to receive a square cut. The square or flush cut
has a tendency to rock or separate from a flush fit during assembly and
use, even though the muntin section is seated on a plastic keeper. The
rocking may cause bent edges which, if not caught during inspection, may
contact the panes of glass, thus causing stress points on the panes of
glass. Also, the joint may come apart during use, thus destroying the
aesthetic appearance of the lattice.
Hygrade Metals, in addition to developing keepers, has attempted to address
the above problem by notching muntin sections that are used in crossbar
assemblies. The notched muntins are interlaced, one on top of another,
with the notches facing each other. In most cases, the notches permit the
two muntins to merge to the thickness of one muntin. However, if there is
not an exact merger, the intersecting surfaces are not flat. Again, this
provides stress on glass panes. Also, upon assembly and use, the expansion
and contraction of the glass and metal due to changes in temperature
causes the intersecting muntins to separate and the glass to contact the
muntin, this creating stress on the glass panes.
It is also noteworthy that the assembly process generally used to assemble
the muntins involves cutting the muntin sections either by routing or with
a single, stationary blade or cutter that produces a square cut. Routing
leaves large burrs that present assembly problems if not removed. To
obtain an angle cut, a muntin is positioned at a desired angle and then
cut by the single blade. The muntin sections are next either punched with
a hole or are notched. The punched and notched muntin sections are moved
to an assembly station, where an assembler assembles the notched pieces
and/or inserts keepers in the punched holes and assembles the muntins
together.
A single blade or cutter is usually operated by an operator, who positions
the muntin strips and presents them to the cutter. This operation is both
slow and labor-intensive. It also does not assure consistent, high-quality
parts. The second common technique, routing, leaves burrs that must be
ground to secure a good fit. This, again, is time-consuming and
labor-intensive. Because the many problem, including inconsistency, tend
to result in insulated windows of questionable quality or longevity, an
apparatus and method of producing consistent muntin sections and
high-quality muntin assemblies in a shorter time period and at a reduced
cost is highly desirable. It is to the solution of the above-mentioned
problems to which the present invention pertains.
SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided in a first
aspect a system for cutting and finishing muntins, the system comprising:
(a) at least one muntin strip cutting device, and
(b) a muntin strip pinning device.
A first muntin strip cutting device for use herein comprises a pair of
cutting blades that are independently rotatably drivable, translatable,
and indexable. The device further comprises a housing and means for
feeding a muntin strip into the device that precisely measures the fed
muntin strip to conform with a pre-set length.
A second cutting device comprises means for stabilizing a muntin strip;
means for cutting the muntin strip in a fish mouth; and means for
translating the means for cutting. Each cutting device may be used
conjointly with or independently of the cutting device depending on the
type of cut imparted to the muntin strip.
The muntin strip pinning device in a first embodiment comprises a guide,
the guide being preferably a magnetic guide. The pinning device further
includes means for punching a pin into a muntin strip.
In a second embodiment, the pinning device includes a cutting blade for
punching a pair of registering holes in a muntin strip. The pinning device
of the embodiment, also, includes means for retracting the blade from the
muntin strip after punching it thereinto.
The muntin strip pinning device hereof further comprises means for feeding
muntin strips into the device that precisely measures the location at
which a pin is to be inserted into the muntin strip or at which the holes
or openings are to be formed.
For a more complete understanding of the present invention reference is
made to the following detailed description and accompanying drawings. In
the drawings, like reference characters refer to like parts throughout the
several views, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view of an exemplary muntin lattice assembly of the type
enabled by the present invention;
FIG. 2 is a perspective view of a cutting apparatus in accordance with a
first aspect of the present invention;
FIG. 3 is a perspective view of a pinning apparatus in accordance with a
second aspect of the present invention;
FIG. 4 is a perspective view of the pinning apparatus with a pin placed
therein;
FIG. 5 is a perspective view of the pinning apparatus with a muntin in
position to have a pin inserted therein;
FIG. 5A is a perspective view of a stabilizer of the pinning apparatus;
FIG. 6 is a perspective view, partly in phantom, with some components
eliminated, for clarity, of a second cutting device in accordance with a
third aspect of the present invention;
FIG. 7 is a rear elevational view of the device of FIG. 6;
FIG. 8 is a perspective view of a cam piece used in the device of FIG. 6;
FIG. 9 is a side view of the cam piece of FIG. 8;
FIG. 10 is a side view of the cutting tool used in the punching device of
FIG. 6;
FIG. 11 is an end view of the tool of FIG. 10;
FIG. 12 is a plan view of a muntin strip with a miter end as produced by
the cutting device of FIG. 2;
FIG. 13 is a plan view of a muntin strip with a bevelled end as produced by
the cutting device of FIG. 2;
FIG. 13A is a plan view of a muntin strip with a fish mouth end as produced
by the cutting device of FIG. 6; and
FIG. 14 is a plan view of a muntin strip with a square end as produced by
the cutting device of FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As hereinabove noted, in a first aspect hereof, the present invention
provides a system for cutting and pinning muntin strips which, generally,
comprise:
(a) at least a first muntin strip cutting device, and
(b) a muntin strip pinning device.
In FIG. 2, there is depicted therein a first muntin cutting apparatus or
device, generally depicted at 10. The apparatus 10 generally includes a
housing 12 having a cutting station 14 disposed therein for cutting muntin
strips 16 into muntin sections. As detailed below, and as noted above, the
apparatus 10 used conjointly with a pinning apparatus 100 and a second
muntin strip cutting device 200 for generating assemblable muntin strips
that may be used in many window configurations. Both the pinning apparatus
100 and the cutting device 200 will be discussed hereinbelow in detail.
The cutting station 14 includes at least one cutting portion. Preferably,
the cutting station 14 comprises a first cutting portion 20 and an
opposing second cutting portion 22 aligned with the first cutting portion
20 and cooperable therewith. The cutting station 14 further comprises
means 24 for translating and positioning each of the cutting portions 20,
22 within the cutting station 14. A muntin strip is disposed between and
is aligned with the cutting portions 20, 22 for cutting the strip into
sections. As shown, the housing 12 includes a support frame 26 constructed
around the cutting portions 20, 22, as discussed in greater detail below.
The means 24 for translating and positioning the cutting portions 20, 22
preferably includes a clamping unit 28, which is used to hold the muntin
strip 16 in place while it is being cut. The clamping unit 28 includes a
seat portion 30 for seating the muntin strip 16 and a cover or cover
portion 32 which urges against the seat portion 30 and the muntin strip 16
to hold and clamp the muntin strip 16 during the cutting operation. Means
for operating, such as a hydraulic fluid or air (not shown), is
operatively connected to the cover portion 32 via a conduit or hose 35 and
is used to impart clamping pressure to the cover portion 32 in a
well-known manner. While the means for operating is preferably a pneumatic
system (not shown), an electrical system may be used to apply the clamping
pressure.
While the clamping unit 28 holds the muntin strip 16 in place, the cutting
portions 20, 22 cut the muntin strip 16 into sections, which are then
assembled. The cutter housing 12 may be mounted on a stand (not shown). It
also may be mounted on a table (not shown) in combination with various
assembly systems.
The housing support frame 26 includes a base plate 34 which has opposing
end walls 36, 38 attached thereto. A top plate 40 is disposed above and
essentially parallel to the base plate 34 and is attached to the end walls
36, 38. A medial support 42, parallel to the end walls 36, 38, is disposed
between the base plate 34 and the top plate 40. The medial support 42
provides support for the muntin clamping unit 28. The base plate 34, end
walls 36, 38, top plate 40 and medial support 42 are preferably made from
steel, but may be made from other metal such as aluminum or from another
highly durable and strong material. Also, the above-described elements of
the support frame 26 may be attached together by fasteners such as screws
or the like (not shown).
The cutting portions 20, 22 are angularly indexable and are disposed within
the housing 12. The first cutting portion 20 is removably mountable to one
end wall 38 and the second cutting portion 22 is removably mountable to
the second end wall 36 by fasteners such as screws or the like (not
shown). The cutting portions 20, 22 are installed opposing each other and
are axially aligned. The cutting portions 20, 22 are each constructed in a
similar manner and therefore only one will be discussed.
As shown in FIG. 2, each cutting portion 20 or 22 includes a rotary cutting
blade 44 and means 46 for angularly indexing the rotary cutting blade 44.
The means 46 for angularly indexing positions the rotary cutting blade 44
for a desired cut on the muntin strip 16. The means 46 for angularly
indexing may additionally be utilized to axially move each of the cutting
stations 20, 22 along the axis x so that they either engage the strip 16
or not. In this fashion, the cutting stations 20, 22 may each be
rotatively positioned and then axially moved into engagement with the
strip to cut it at a desired angle.
The rotary cutting blade 44 is mounted on a plate 52 which is, in turn,
attached to the means 46 for angularly indexing by welding or the like.
The plate 52 has a first front surface 54 and a second rear surface 56.
The cutting blade 44 is removably mounted onto a rotary axle 58 which is
disposed on the first surface 54 of the plate 52. The rotary axle 58
extends through an aperture formed in the mounting plate 52, the blade 44
being mounted thereonto by any suitable mode.
The rotary axle 58 is removably attached to means 60 for rotatably driving
the rotary axle 58 and cutting blade 44. The means 60 for rotatably
driving is disposed on the second surface 56 of the plate 52 and may
comprise any suitable drive, such as an electric motor or the like.
The cutting blade 44 may be an abrasive cutting wheel or a metal cutting
wheel or circular saw or other type cutting blade. Preferably, a high
speed cutting blade is used so as to prevent burning of stock and to
provide for a clean edge after cutting. The high speed cutting blade
substantially eliminates or reduces burring at the cut edges.
As noted, the means 60 for rotatably driving the cutting blade 44 is
preferably an electric motor, but may be a hydraulic or pneumatic motor as
well. These motors are commercially available and known to those skilled
in the art.
The rotary cutting blade 44 is rotatably indexed to multiple positions to
provide a plurality of cutting angles. The preferable cutting angle
positions for the cutting blade 44 will be discussed in detail
hereinbelow. The rotary cutting blade 44 is also adapted to be translated
horizontally via the means 24 for translating. The means 24 for
translating moves the blade through and away from the muntin strip 16
while the cutting blade 44 is rotating.
The means 46 for angularly indexing positions the rotary cutting blade 44
at the proper cutting angles before the rotary cutting blade 44 is
translated to, through and away from the muntin strips 16. The means 46
for angularly indexing preferably includes a rotary indexing system, as
described hereinbelow, for setting the plurality of cutting angles for the
rotary cutting blade 44 before translating the rotary cutting blade 44 to
and from the cutting station 14.
The rotary indexing system includes a shaft 64 which extends between the
rotary cutting blade 44 and the means 60 for rotatably driving. The shaft
64 extends through an aperture 65 provided in the wall 38. A shaft seats
through an aperture in each end wall 36, 38. A link plate 59 is slidingly
mounted onto the shaft 64 for indexing the shaft 64. The link plate is
actuated by first means 66 for moving. The first means 66 for moving
comprises a first cylinder 68, mounted on the end wall 36, pivotally
connected to the link plate 59 via a pivot pin and a mounting block 69.
The first cylinder 68 actuates the link plate 59 to index the shaft 64 and
position the rotary cutting blade 44 at the desired cutting angle.
When the cylinder 68 is actuated, a cylinder rod 67 is extended or
retracted, causing the mounting block 69 and, thus, the link plate 59 to
move in the directions shown by the arrow 79. Because the plate 59 is
fixed to the shaft 64, rotation thereof is imparted thereto, thus causing
the cutting blade 44 to index. The indexing angle of the cutting blade 44
is preferably determined by a fluid control system (not shown) which is in
fluid communication with the first cylinder 68. The control system (not
shown) causes the fluid to activate the first cylinder 68 to the desired
indexing angle. Alternatively, the first cylinder 68 may be pre-set to
desired indexing angles by pre-setting the first cylinder 68 in a manner
well-known to those skilled in the art.
The means 24 for translating, preferably, includes second means 70 for
moving also mounted to the link plate 59. The second means 70 comprises a
second powered cylinder 72 removably mounted to the link plate 59 and
fixedly connected to the shaft 64. In use, after the first cylinder 68 is
used to position the rotary cutting blade 44, the second cylinder 72
translates or moves the cutting blade 44 into position to cut the muntin
strip 16. When the cutting operation is complete, the second cylinder 72
retracts the rotary cutting blade 44 from the muntin strip 16.
The first cylinder 68 and the second cylinder 72 are preferably pneumatic
cylinders, but may be hydraulic cylinders. The cylinders 68, 72 are
commercially available and are known to those skilled in the art.
The cutting apparatus 10 preferably has its operations controlled by an
electronic programmable controller system (not shown) which is
commercially available from any controller manufacturer, such as
Allen-Bradley Co. of Michigan. In the alternative, a pneumatic controller
system such as those commercially available from Industrial Air &
Hydraulic Co. of Michigan, or a hydraulic controller system such as those
commercially available from Pabco Fluid Power Co. of Michigan, may be
used.
The apparatus 10 additionally includes means 74 for setting the length of
the strip 16. The means 74 for setting the length of the strip generally
includes a track 76, a roller 78, and a device 80 for measuring the
position of the roller 78 on the track 76. Such systems are well known.
One such system is produced by Accurate Technology under the tradename
Proscale. The means 74 for setting the length of the strip may be
configured to measure the length of the strip 16 from the axis x where the
cutting takes place to the location of the roller 78. In this way, one
using the system can know with accuracy to one thousandth of an inch the
length of the muntin strip 16 that is produced on the apparatus 10. This
is accomplished by rolling the roller 78 into engagement with the end of
the muntin strip 16. The device 80 for measuring will then display the
length of the muntin strip 16.
The apparatus 10 may be used to produce three preferable basic types of
cut. More particularly, each of the cutting stations 20, 22 may be used to
produce the cuts shown in FIGS. 12, 13 and 14. Specifically, the device or
apparatus may be used to produce a miter cut 47, as shown in FIG. 12,
where each opposed cutting station 20, 22 cuts the strip at substantially
the same angle. Additionally, the apparatus may be used to produce a
bevelled cut 48, as shown in FIG. 13, which is similar to the miter cut 47
except that one of the cutting stations 20, 22 is rotated subsequent to
making the angled cut so that the blade is normal to the muntin strip and
is engaged therewith to cut off the end of the strip 16, which provides
the flat-ended.
Finally, the apparatus 10 may be used to produce a flat cut 50, as shown in
FIG. 14. In this instance, only one station 20 or 22 is engaged with the
strip while positioned normal thereto, which produces the cut shown in
FIG. 14. Because each of the cutting stations 20, 22 may be rotated and
laterally positioned, a cut having substantially any configuration may be
made to the muntin strip 16.
This present cutting device or apparatus is more particularly described in
U.S. patent application Ser. No. 08/680,507, filed Jul. 8, 1996, for
"Apparatus For Cutting and Assembling Muntins," the disclosure of which is
hereby incorporated by reference.
As detailed hereinbelow, the cutting device may be eliminated from the
system or used conjointly with or independent of the second cutting device
200, depending of the configuration of the end of the muntin strip that is
desired.
In forming a lattice, such as is shown in FIG. 1, a plurality of muntin
strips are interconnected with suitable fasteners (FIG. 14). To effect
this interconnection, ordinarily the fasteners are pinned or otherwise
interconnected to each other. Thus, the present invention incorporates a
pinning device for enabling interconnection.
Referring now to FIGS. 3-5, there is shown a first embodiment of a pinning
apparatus 100 in accordance herewith for enabling interconnection. The
apparatus 100 generally includes a stabilizer 102, a plunger 104, a guide
plate 106, and means 108 for actuating the plunger 104.
The stabilizer 102 is used to hold a muntin strip in position while it is
being pinned. The stabilizer 102 is preferably formed from any strong
durable material such as steel or the like. More particularly, the
stabilizer 102 is a solid member with a channel 110 formed therethrough
and into which a muntin strip 16 or 112 is inserted. The channel 110 has
the same configuration as the muntin 112. Because there are several
differently sized muntins available for use in windows, one of several
differently configured stabilizers may be used such that the muntin 16 or
112 may slide through the channel 110. Alternatively, the stabilizer 102
may contain a plurality of channels of different sizes to accommodate
differently-sized muntins. In yet another alternative, the stabilizer 102
functions to clamp the strip 16 or 112 in place. In that instance, the
stabilizer has a seating portion and a top portion and would function
substantially similarly to the clamping unit 28 of the cutting apparatus
10.
The guide 106 is preferably formed from a magnetic material, for reasons
described hereinbelow. The guide 106 has a top surface 114, a bottom
surface 116, a side 118 in close proximity to the stabilizer 102, and a
side 120 opposite side 118 and thus farther from the stabilizer 102. A
channel 122 is formed in the side 120 of the guide 106. The channel 122
extends along the entire length of the side 120 and is configured to
receive a pin 124. The pin 124 is, preferably, but not necessarily, formed
from a metal such that it is attracted to the guide, which is magnetic. In
this fashion, and as shown in FIG. 4, the pin 124 slidably seats in the
channel 122 via the magnetic attraction.
A plunger 104 is telescopingly housed within a base 126 to which the
stabilizer 102 and the guide 106 are mounted. The stabilizer 102 and the
guide 106 may be mounted to the base via welding, screws, or other means
for mounting that are well known to the skilled artisan. The plunger 104
has a small recess 128 formed at the end 130 thereof. The end of the pin
124 is placed in the recess 128 in the plunger 104 by any suitable means,
including manual placement, and seats in the channel 122 in the guide 106.
The plunger 104 is moved horizontally outwardly from the base 126 via the
means 108 for actuating the plunger. The means 108 is, preferably,
pneumatic and includes a compressed air supply (not shown) connected via a
hose 130 to a valve 132. The valve 132 is, preferably, mounted to the base
126 via any well known means for mounting. The valve 132 may be adjusted
to ensure that the air pressure is appropriate for the device 100.
A second conduit or hose 134 provides communication of the air from the
valve 132 to the plunger 104 to slidably horizontally extend the plunger
104 toward the guide 106 and push the pin 124 toward the muntin 112 seated
in front thereof, as depicted in FIG. 5. The pin 124 stays within the
muntin 112 upon being plunged thereinto, to allow a lattice of muntins to
be formed as described hereinbelow. The device 100 is activated via a push
button 136 that is connected to a second valve (not shown) or to an
actuator (not shown) that allows the air to push the plunger 104 outward
from the base 126. Such valves and switches are well known to the skilled
artisan.
The device or apparatus 100 additionally includes means 138 for measuring
the distance from the end of the muntin 112 to the location on the muntin
where the pin 124 or blade 125 is to be inserted. The means 138 generally
includes a track 140, a roller 142, and a device 144 for measuring the
position of the roller 142 on the track 140. Such systems are well known.
One such system is produced by Accurate Technology under the tradename
Proscale. The means 138 for measuring may be configured to measure the
length of the strip 112 from the end of the strip 112 to where the pin 124
is inserted. In this way, a user can accurately and with precision
determine the distance from the end of the muntin strip 112 to the
location where the pin 124 is inserted. This is accomplished by rolling
the roller 142 into engagement with the end of the muntin strip 112. The
device for measuring 144 displays the distance.
In use, the muntin 112 is slid into the channel 122 until the end of the
muntin 112 abuts the roller 142, which is set to the desired distance. A
pin 124 is inserted into the channel 122 in the guide 106 so that its end
seats in the recess 128 in the plunger 104. The button 136 is depressed to
activate the apparatus 100 and the plunger 104 is pushed out towards the
muntin 112, thereby projecting the pin 124 into the muntin 112 with
sufficient force that the pin 124 travels completely through the muntin
112 and is seated therein with the ends of the pin 124 extending from
either side of the muntin 112 (FIG. 14).
The pin 124 stays in the muntin 112 after pinning, after which a catch 113
(FIG. 14) may be slidably mounted onto the pin and inserted into the end
of an adjoining muntin 112. Each catch is slidably received in the end of
a muntin 112 such that a plurality of muntins may be connected. The
configuration of the connected muntins is dependent upon the design
desired by the user, one such configuration being shown in FIG. 1.
With reference now to FIG. 5, there is depicted a second embodiment of the
pinning device. According to this embodiment, a blade 125 is deployed for
providing registering openings, in lieu of the pin 124. In all other
respects, the embodiments are substantially the same, Thus, the blade 125
is fixedly mounted to the plunger 104 and slides in the guideway or
channel 122. When the means 108 for actuating the plunger drives the
plunger 104 into the muntin 112, the blade 125, which is fixedly mounted
to the plunger 104, punches a hole in the muntin 112 by being driven all
the way therethrough. When the means 108 retracts the plunger 104 from the
muntin, to allow the muntin to be removed from the device and to allow
another muntin to be punched, the blade 125 is, also, retracted. In this
way, the device punches a hole in the muntin 112 rather than inserting a
pin 124 into the muntin. A catch (not shown) is inserted through the holes
punched in the muntin for attachment to catches in other muntins as in the
first embodiment.
As shown in FIG. 5A, the stabilizer 102 may comprise a rotatable disc 103
having at least one circumferential groove 105 formed therein, into which
is seated a muntin to be pierced by a pin 124 or blade 125. The disc 103
is aligned with the guide 106 and, thus, defines a stop for either a pin
or a blade. Preferably, the disc 103 has a plurality of grooves, two being
shown in FIG. 5A, of different sizes to accommodate different diameter
muntin strips.
As noted above, the present invention contemplates a second cutting device
shown generally at 200 in FIGS. 6-11. The device 200 is used to trim a
flat end of a muntin strip (not shown) into a fish mouth shape as shown at
48' in FIG. 13A. The device 200 includes a base 202, a housing 204, a
cutting tool 206 disposed within the housing and a cam 208 for controlling
the path of the cutting tool 206.
The cutting device 200 is, preferably, pneumatically operated for driving
the cutting tool 206. However, an electric motor or a hydraulic system may
also be used, although they are not as preferable. As such, one end of a
conduit or hose 210 is connected to a compressed air source (not shown),
is connected at its other end to a valve 212. The valve 212 serves as
means for regulating the pressure of the air supplied to the device 200.
The valve 212 is preferably mounted to the base via any suitable means for
mounting. An air cylinder 214 is connected at one end to the valve 212 via
any suitable coupling such as a hose 213 and at its other end to a cam
block 208 disposed within the housing 204, as detailed below.
The housing 204 has at least one and preferably two or more muntin
receiving cavities formed therein. More particularly, the housing 204 has
a first cavity 216 for insertingly receiving an end of a muntin strip
therein. As such, the cavity has a configuration substantially similar to
the exterior configuration of a muntin strip.
A second cavity 224 is formed in the housing 204. The second cavity 224 has
a substantially rectangular configuration. However, the top is slightly
tapered, as can be seen in FIG. 7. The cavity 224 extends substantially
the entire length of the housing 204 and is in registry with the cavity.
The cavity 224 has substantially the same configuration as the tool 206
such that the tool 206 may be slidably received therein. The tool 206,
which will be described in detail hereinbelow, slides within the cavity
224.
The housing 204 has a third cavity 226 formed therein which communicates
with the second cavity 224. The cavity 226 is substantially rectangular
and is configured to slidably receive a cam or cam block 208 therein. The
cam 208 is seated in the cavity 226 and is functionally contained
therewithin. As shown in FIGS. 8 and 9, the cam 208 has a top surface 228,
a first leg 230 and a second substantially identical leg 232 spaced apart
from the first leg. Each of the legs 230, 232 has a race 234, 234' formed
therein. The cam is seated in the third cavity 226 such that the top
surface 228 of the cam is parallel to the top surface 220 of the housing
204. The cam 208 is oriented in the third cavity 226 such that the cutting
tool 206 may slidably fitted between the two legs 230, 232 when it is
slidably seated in the second cavity 224. The cam 208 slides up and down
in the third cavity 226 in response to air pressure provided thereto by
the air cylinder 214, which is connected to the top surface 228 of the
cam. A mounting plate 236 is secured to the top surface of the housing 204
to secure the cylinder 214 in position.
The housing 204 has an aperture 238 formed through the first side 222
providing communication between the outside of the housing 204 and the
third cavity 226. The aperture 238 is configured to slidably receive a
rolling axle 240 therethrough. The axle fits through the race 234 in the
first leg 230, through an aperture 242 in the cutting tool 206, and then
through the race 234' in the second leg 232. A plate or screw (not shown)
is then inserted into the aperture 238 in the housing 204 to provide
sealing thereof.
The third cavity 226 may have a spring (not shown) or the like disposed
therein to bias the cam 208 upwardly. As such, when pressure is supplied
to the top 228 of the cam 208 via the air cylinder 214, which is secured
to the top of the cam 208 as described hereinabove, the cam is forced
downward. The downward motion of the cam 208 is translated into horizontal
motion of the cutting tool 206, which will be described hereinbelow in
more detail.
Looking to the races 234, 234', it is apparent that as the cam 208 is
forced downwardly by air pressure from the cylinder 214, the cutting tool
206 is forced to follow the path defined by the races 234, 234'. The
cutting tool 206 includes a tooth 244 that moves laterally with the
cutting tool 206. The tooth 244 is located at the center of the first
cavity 216 when no air pressure is supplied to the third cavity 226. As
such, when the device 200 is in a resting state, i.e. when no air pressure
is supplied, the tooth 244 will seat within a muntin strip 16 that is
placed in the first cavity 216 and that surmounts the tooth.
When air pressure is supplied via the cylinder 214, the tooth 244 and the
rest of the cutting tool 206 shift toward the back wall 218 of the housing
204. This trims one side of the muntin strip 16. As the cam 208 continues
downward, the cutting tool 206 begins to shift toward the front wall 217
of the housing 204. As the cam 208 moves toward the front wall 217 of the
housing 204, it trims the other side of the muntin strip 16. In this
fashion, a muntin strip 16 having the configuration depicted at 50 in FIG.
14 may be inserted into the device 200 and will emerge with a fish mouth
cut 48', as shown resembling FIG. 13A.
The device 200 is activated via a start button 250 which connects the air
source (not shown) to the third cavity 226.
The first side 222 of the housing 204 additionally has two small apertures
246, 248 formed therethrough proximate the first cavity 216 and providing
communication between the first cavity 216 and the exterior of the housing
204. As the tooth 244 moves towards the back wall 218, the piece of the
muntin (not shown) that is trimmed is blown out of one of the apertures
246. Then, as the tooth 244 travel in the opposite direction and trims the
other side of the muntin (not shown), the trimmed piece is blown out of
the other aperture 248. The air pressure provided accomplishes this task.
In an alternate embodiment hereof, cutting device 200 as described may be
paired with a similar ore and be powered by a single air source, thus
allowing cutting of two muntins simultaneously as the cutting tool 206
translates.
It is to be appreciated that the punching device 200 may be used conjointly
with or independently of the cutting device 10 for forming a fish mouth
cut.
In use the present invention allows a user to cut, trim and prepare muntins
to be mounted to one another. The present invention additionally allows a
user to produce muntins with many different configurations that will not
damage glass panes between which they are to be seated. This is
accomplished by the precise tooling provided by the specific components of
the present system.
The present invention provides for production of high quality,
well-assembled lattice matrices that retain their assembled configurations
for extended periods of time, eliminate muntin section separation, and
thus reduce any stresses on multi-layered glass panes. This provides for a
long-lasting, aesthetically pleasing window or door. The apparatus
provides for multiple-angle miter cutting of muntin strips and close
tolerance fitting.
While the invention has been illustrated and described in detail in the
drawings and the foregoing description, the same to be considered as
illustrative and not restrictive in character, it being understood that
only the preferred embodiment has been shown and described and that all
changes and modifications that come within the spirit of the invention are
desired to be protected.
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